Study of Coordination Number of Al^<3+> by Wave Length Shift of AlKα Radiation in a Clinopyroxene CaFe^<3+>AlSiO_6

Clinopyroxene with a composition of CaFe^<3+>AlSiO_6 has been synthesized from glass and its wave length shift of emitting AlKα radiation was studied by the X-ray fluorescence spectroscopy with reference to aluminum metal, anorthite, orthoclase, corundum and jadeite. The result shows that Al^<3+> ions occupy not only the site of 4-fold coordination but also the site of 6-fold coordination.